forked from skristiansson/uClibc-or1k
-
Notifications
You must be signed in to change notification settings - Fork 7
/
Rules.mak
838 lines (737 loc) · 26.7 KB
/
Rules.mak
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
# Rules.make for uClibc
#
# Copyright (C) 2000-2008 Erik Andersen <[email protected]>
#
# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
#
# make nano-doc
# FOO = bar -- recursively expanded variable. Value is remebered verbatim.
# If it contains references to other variables, these references
# are expanded whenever this variable is _substituted_.
# FOO := bar -- simply expanded variable. Right hand is expanded when
# the variable is _defined_. Therefore faster than =.
# FOO ?= bar -- set a value only if it is not already set
# (behaves as =, not :=).
# FOO += bar -- append; if FOO is not defined, acts like = (not :=).
# check for proper make version
ifneq ($(findstring x3.7,x$(MAKE_VERSION)),)
$(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
endif
#-----------------------------------------------------------
# This file contains rules which are shared between multiple
# Makefiles. All normal configuration options live in the
# file named ".config". Don't mess with this file unless
# you know what you are doing.
clean_targets := clean realclean distclean \
objclean-y headers_clean-y CLEAN_utils
noconfig_targets := menuconfig config nconfig \
oldaskconfig silentoldconfig oldconfig allnoconfig allyesconfig \
alldefconfig randconfig defconfig savedefconfig listnewconfig \
olddefconfig \
xconfig gconfig update-po-config mconf qconf gconf nconf conf \
release dist tags help
#-----------------------------------------------------------
# If you are running a cross compiler, you will want to set
# 'CROSS_COMPILE' to something more interesting ... Target
# architecture is determined by asking the CC compiler what
# arch it compiles things for, so unless your compiler is
# broken, you should not need to specify TARGET_ARCH.
#
# Most people will set this stuff on the command line, i.e.
# make CROSS_COMPILE=arm-linux-
# will build uClibc for 'arm'.
# CROSS is still supported for backward compatibily only
CROSS_COMPILE ?= $(CROSS)
CC = $(CROSS_COMPILE)gcc
AR = $(CROSS_COMPILE)ar
LD = $(CROSS_COMPILE)ld
NM = $(CROSS_COMPILE)nm
OBJDUMP = $(CROSS_COMPILE)objdump
STRIPTOOL = $(CROSS_COMPILE)strip
INSTALL = install
LN = ln
RM = rm -f
TAR = tar
SED = sed
AWK = awk
STRIP_FLAGS ?= -x -R .note -R .comment
## unused? if yes, remove after 0.9.31
## UNIFDEF := $(top_builddir)extra/scripts/unifdef
# Select the compiler needed to build binaries for your development system
HOSTCC = gcc
BUILD_CFLAGS = -Os
#---------------------------------------------------------
# Nothing beyond this point should ever be touched by mere
# mortals. Unless you hang out with the gods, you should
# probably leave all this stuff alone.
# strip quotes
qstrip = $(strip $(subst ",,$(1)))
#"))
# kconfig stuff
KCONFIG_CONFIG ?= $(top_builddir).config
KCONFIG_CONFIG := $(abspath $(KCONFIG_CONFIG))
export KCONFIG_CONFIG
KCONFIG_AUTOCONFIG := $(dir $(KCONFIG_CONFIG))include/config/auto.conf
export KCONFIG_AUTOCONFIG
KCONFIG_TRISTATE := $(dir $(KCONFIG_CONFIG))include/config/tristate.conf
export KCONFIG_TRISTATE
srctree := $(abspath $(top_srcdir))
export srctree
KCONFIG_AUTOHEADER := $(dir $(KCONFIG_CONFIG))include/generated/autoconf.h
export KCONFIG_AUTOHEADER
Kconfig := $(abspath $(top_srcdir)extra/Configs/Config.in)
# Pull in the user's uClibc configuration
ifeq ($(filter $(noconfig_targets) clean CLEAN_%,$(MAKECMDGOALS)),)
-include $(KCONFIG_CONFIG)
endif
TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH))
ifeq ($(TARGET_ARCH),)
ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \
-e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
-e s/arm.*/arm/ -e s/sa110/arm/ \
-e s/sh.*/sh/ \
-e s/s390x/s390/ -e s/parisc.*/hppa/ \
-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
-e s/xtensa.*/xtensa/ )
else
ARCH = $(TARGET_ARCH)
endif
export ARCH
# Make certain these contain a final "/", but no "//"s.
scrub_path = $(strip $(subst //,/, $(subst ,/, $(call qstrip,$(1)))))
TARGET_SUBARCH := $(call qstrip,$(TARGET_SUBARCH))
RUNTIME_PREFIX := $(call scrub_path,$(RUNTIME_PREFIX))
DEVEL_PREFIX := $(call scrub_path,$(DEVEL_PREFIX))
MULTILIB_DIR := $(call scrub_path,$(MULTILIB_DIR))
KERNEL_HEADERS := $(call scrub_path,$(KERNEL_HEADERS))
export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
# Now config hard core
MAJOR_VERSION := 0
MINOR_VERSION := 9
SUBLEVEL := 34
EXTRAVERSION :=-git
VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
ABI_VERSION := $(MAJOR_VERSION)
ifneq ($(EXTRAVERSION),)
VERSION := $(VERSION)$(EXTRAVERSION)
endif
# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
LC_ALL := C
export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
LIBC := libc
SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
UBACKTRACE_DSO := libubacktrace.so.$(ABI_VERSION)
UCLIBC_LDSO_NAME := ld-uClibc
ARCH_NATIVE_BIT := 32
ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 powerpc64 s390x sparc64 x86_64 ),)
UCLIBC_LDSO_NAME := ld64-uClibc
ARCH_NATIVE_BIT := 64
else
ifeq ($(CONFIG_MIPS_N64_ABI),y)
UCLIBC_LDSO_NAME := ld64-uClibc
ARCH_NATIVE_BIT := 64
endif
endif
UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
NONSHARED_LIBNAME := uclibc_nonshared.a
libc := $(top_builddir)lib/$(SHARED_LIBNAME)
libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
ifneq ($(ARCH_HAS_NO_SHARED),y)
libdl.depend := $(top_builddir)lib/libdl.so
endif
ifneq ($(HAS_NO_THREADS),y)
libpthread.depend := $(top_builddir)lib/libpthread.so
endif
interp := $(top_builddir)lib/interp.os
ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
headers_dep := $(top_builddir)include/bits/sysnum.h
sub_headers := $(headers_dep)
#LIBS :=$(interp) -L$(top_builddir)lib -lc
LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
# Make sure DESTDIR and PREFIX can be used to install
# PREFIX is a uClibcism while DESTDIR is a common GNUism
ifndef PREFIX
PREFIX = $(DESTDIR)
endif
ifneq ($(HAVE_SHARED),y)
libc :=
interp :=
ldso :=
endif
comma:=,
space:= #
ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE=$(call qstrip,$(CROSS_COMPILER_PREFIX))
endif
# A nifty macro to make testing gcc features easier
check_gcc=$(shell \
if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
then echo "$(1)"; else echo "$(2)"; fi)
check_as=$(shell \
if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
then echo "-Wa,$(1)"; fi)
check_ld=$(shell \
if $(CC) $(LDFLAG-fuse-ld) -Wl,$(1) $(CFLAG_-nostdlib) -o /dev/null -Wl,-b,binary /dev/null > /dev/null 2>&1; \
then echo "$(1)"; fi)
# Use variable indirection here so that we can have variable
# names with fun chars in them like equal signs
define check-tool-var
ifeq ($(filter $(clean_targets) CLEAN_%,$(MAKECMDGOALS)),)
_v = $(2)_$(3)
ifndef $$(_v)
$$(_v) := $$(call $(1),$(subst %, ,$(3)))
export $$(_v)
endif
endif
endef
# Usage: check-gcc-var,<flag>
# Check the C compiler to see if it supports <flag>.
# Export the variable CFLAG_<flag> if it does.
define check-gcc-var
$(call check-tool-var,check_gcc,CFLAG,$(1))
endef
# Usage: check-as-var,<flag>
# Check the assembler to see if it supports <flag>. Export the
# variable ASFLAG_<flag> if it does (for invoking the assembler),
# as well CFLAG_-Wa<flag> (for invoking the compiler driver).
define check-as-var
$(call check-tool-var,check_as,ASFLAG,$(1))
_v = CFLAG_-Wa$(1)
export $$(_v) = $$(if $$(ASFLAG_$(1)),-Wa$$(comma)$$(ASFLAG_$(1)))
endef
# Usage: check-ld-var,<flag>
# Check the linker to see if it supports <flag>. Export the
# variable LDFLAG_<flag> if it does (for invoking the linker),
# as well CFLAG_-Wl<flag> (for invoking the compiler driver).
define check-ld-var
$(call check-tool-var,check_ld,LDFLAG,$(1))
_v = CFLAG_-Wl$(1)
export $$(_v) = $$(if $$(LDFLAG_$(1)),-Wl$$(comma)$$(LDFLAG_$(1)))
endef
# Usage: cache-output-var,<variable>,<shell command>
# Execute <shell command> and cache the output in <variable>.
define cache-output-var
ifndef $(1)
$(1) := $$(shell $(2))
export $(1)
endif
endef
ARFLAGS:=cr
# Note: The check for -nostdlib has to be before all calls to check_ld
$(eval $(call check-gcc-var,-nostdlib))
LDFLAG-fuse-ld := $(filter -fuse-ld=%,$(EXTRA_UCLIBC_FLAGS))
# deliberately not named CFLAG-fuse-ld since unchecked and from user
# Flags in OPTIMIZATION are used only for non-debug builds
OPTIMIZATION:=
# Use '-Os' optimization if available, else use -O2, allow Config to override
$(eval $(call check-gcc-var,-Os))
ifneq ($(CFLAG_-Os),)
OPTIMIZATION += $(CFLAG_-Os)
else
$(eval $(call check-gcc-var,-O2))
OPTIMIZATION += $(CFLAG_-O2)
endif
# Use the gcc 3.4 -funit-at-a-time optimization when available
$(eval $(call check-gcc-var,-funit-at-a-time))
OPTIMIZATION += $(CFLAG_-funit-at-a-time)
# shrinks code by about 0.1%
$(eval $(call check-gcc-var,-fmerge-all-constants))
$(eval $(call check-gcc-var,-fstrict-aliasing))
OPTIMIZATION += $(CFLAG_-fmerge-all-constants) $(CFLAG_-fstrict-aliasing)
$(eval $(call cache-output-var,GCC_VER,$(CC) -dumpversion))
GCC_VER := $(subst ., ,$(GCC_VER))
GCC_MAJOR_VER ?= $(word 1,$(GCC_VER))
#GCC_MINOR_VER ?= $(word 2,$(GCC_VER))
ifneq ($(TARGET_ARCH),arc)
ifeq ($(GCC_MAJOR_VER),4)
# shrinks code, results are from 4.0.2
# 0.36%
$(eval $(call check-gcc-var,-fno-tree-loop-optimize))
OPTIMIZATION += $(CFLAG_-fno-tree-loop-optimize)
# 0.34%
$(eval $(call check-gcc-var,-fno-tree-dominator-opts))
OPTIMIZATION += $(CFLAG_-fno-tree-dominator-opts)
# 0.1%
$(eval $(call check-gcc-var,-fno-strength-reduce))
OPTIMIZATION += $(CFLAG_-fno-strength-reduce)
endif
endif
# CPU_CFLAGS-y contain options which are not warnings,
# not include or library paths, and not optimizations.
# Why -funsigned-char: I hunted a bug related to incorrect
# sign extension of 'char' type for 10 hours straight. Not fun.
CPU_CFLAGS-y := -funsigned-char -fno-builtin
$(eval $(call check-gcc-var,-fno-asm))
CPU_CFLAGS-y += $(CFLAG_-fno-asm)
LDADD_LIBFLOAT=
ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
# If -msoft-float isn't supported, we want an error anyway.
# Hmm... might need to revisit this for arm since it has 2 different
# soft float encodings.
ifneq ($(TARGET_ARCH),nios)
ifneq ($(TARGET_ARCH),nios2)
ifneq ($(TARGET_ARCH),sh)
ifneq ($(TARGET_ARCH),c6x)
CPU_CFLAGS-y += -msoft-float
endif
endif
endif
endif
ifeq ($(TARGET_ARCH),arm)
# No longer needed with current toolchains, but leave it here for now.
# If anyone is actually still using gcc 2.95 (say), they can uncomment it.
# LDADD_LIBFLOAT=-lfloat
endif
endif
$(eval $(call check-gcc-var,-std=gnu99))
CPU_CFLAGS-y += $(CFLAG_-std=gnu99)
CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
PICFLAG-y := -fPIC
PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF) := -mdsbt -fpic
PICFLAG := $(PICFLAG-y)
PIEFLAG_NAME:=-fPIE
# Some nice CPU specific optimizations
ifeq ($(TARGET_ARCH),i386)
$(eval $(call check-gcc-var,-fomit-frame-pointer))
OPTIMIZATION += $(CFLAG_-fomit-frame-pointer)
ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586),y)
# TODO: Change this to a gcc version check. This bug
# should be fixed with at least gcc-4.3.
# Non-SSE capable processor.
# NB: this may make SSE insns segfault!
# -O1 -march=pentium3, -Os -msse etc are known to be affected.
# See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
# -m32 is needed if host is 64-bit
OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
else
$(eval $(call check-gcc-var,-mpreferred-stack-boundary=4))
OPTIMIZATION += $(CFLAG_-mpreferred-stack-boundary=4)
endif
# Choice of alignment (please document why!)
# -falign-labels: in-line labels
# (reachable by normal code flow, aligning will insert nops
# which will be executed - may even make things slower)
# -falign-jumps: reachable only by a jump
# Generic: no alignment at all (smallest code)
GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
OPTIMIZATION+=$(GCC_FALIGN)
# Putting each function and data object into its own section
# allows for kbytes of less text if users link against static uclibc
# using ld --gc-sections.
# ld 2.18 can't do that (yet?) for shared libraries, so we itself
# do not use --gc-sections at shared lib link time.
# However, in combination with sections being sorted by alignment
# it does result in much reduced padding:
# text data bss dec hex
# 235319 1472 5992 242783 3b45f old.so
# 234104 1472 5980 241556 3af94 new.so
# Without -ffunction-sections, all functions will get aligned
# to 4 byte boundary by as/ld. This is arguably a bug in as.
# It specifies 4 byte align for .text even if not told to do so:
# Idx Name Size VMA LMA File off Algn
# 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
CPU_CFLAGS-y += $(CFLAG_-ffunction-sections) $(CFLAG_-fdata-sections)
CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-common)
$(eval $(call check-ld-var,--sort-section=alignment))
CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-section=alignment)
CPU_LDFLAGS-y+=-m32
CPU_CFLAGS-y+=-m32
endif
ifeq ($(TARGET_ARCH),sparc)
CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
endif
ifeq ($(TARGET_ARCH),arm)
CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
endif
ifeq ($(TARGET_ARCH),metag)
SYMBOL_PREFIX=_
CPU_CFLAGS-$(CONFIG_META_1_2)+=
CPU_CFLAGS-$(CONFIG_META_2_1)+=-Wa,-mcpu=metac21
endif
ifeq ($(TARGET_ARCH),mips)
OPTIMIZATION+=-mno-split-addresses
CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64R2)+=-mips64r2 -mtune=mips64r2
ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
endif
ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
endif
CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
endif
ifeq ($(TARGET_ARCH),nios)
OPTIMIZATION+=-funaligned-struct-hack
CPU_LDFLAGS-y+=-Wl,-m32
CPU_CFLAGS-y+=-Wl,-m32
endif
ifeq ($(TARGET_ARCH),sh)
$(eval $(call check-gcc-var,-mprefergot))
OPTIMIZATION += $(CFLAG_-mprefergot)
CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
CPU_CFLAGS-$(CONFIG_SH2)+=-m2
CPU_CFLAGS-$(CONFIG_SH3)+=-m3
ifeq ($(UCLIBC_HAS_FPU),y)
CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
CPU_CFLAGS-$(CONFIG_SH4)+=-m4
else
CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
endif
endif
ifeq ($(TARGET_ARCH),sh64)
CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
endif
ifeq ($(TARGET_ARCH),h8300)
SYMBOL_PREFIX=_
CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
endif
ifeq ($(TARGET_ARCH),i960)
OPTIMIZATION+=-mh -mint32 #-fsigned-char
endif
ifeq ($(TARGET_ARCH),e1)
OPTIMIZATION+=-mgnu-param
endif
ifeq ($(TARGET_ARCH),cris)
CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
PICFLAG:=-fpic
PIEFLAG_NAME:=-fpie
endif
ifeq ($(TARGET_ARCH),m68k)
# -fPIC is only supported for 68020 and above. It is not supported
# for 68000, 68010, or Coldfire.
PICFLAG:=-fpic
PIEFLAG_NAME:=-fpie
endif
ifeq ($(TARGET_ARCH),powerpc)
# PowerPC can hold 8192 entries in its GOT with -fpic which is more than
# enough. Therefore use -fpic which will reduce code size and generates
# faster code.
PICFLAG:=-fpic
PIEFLAG_NAME:=-fpie
PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
endif
ifeq ($(TARGET_ARCH),bfin)
SYMBOL_PREFIX=_
ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
CPU_CFLAGS-y:=-mfdpic
CPU_LDFLAGS-y += -Wl,-melf32bfinfd
PICFLAG:=-fpic
PIEFLAG_NAME:=-fpie
endif
ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
PICFLAG := -mleaf-id-shared-library
endif
endif
ifeq ($(TARGET_ARCH),frv)
CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
# Using -pie causes the program to have an interpreter, which is
# forbidden, so we must make do with -shared. Unfortunately,
# -shared by itself would get us global function descriptors
# and calls through PLTs, dynamic resolution of symbols, etc,
# which would break as well, but -Bsymbolic comes to the rescue.
export LDPIEFLAG:=-shared -Wl,-Bsymbolic
UCLIBC_LDSO=ld.so.1
endif
ifeq ($(strip $(TARGET_ARCH)),avr32)
CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
endif
ifeq ($(TARGET_ARCH),i960)
SYMBOL_PREFIX=_
endif
ifeq ($(TARGET_ARCH),v850)
SYMBOL_PREFIX=_
endif
ifeq ($(TARGET_ARCH),c6x)
PIEFLAG:=
CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
CPU_LDFLAGS-y += $(CPU_CFLAGS)
endif
ifeq ($(TARGET_ARCH),arc)
CPU_CFLAGS-y += -mlock -mswape
CPU_CFLAGS-$(CONFIG_ARC_CPU_700) += -mA7
CPU_LDFLAGS-y += $(CPU_CFLAGS) -marclinux
endif
ifeq ($(TARGET_ARCH),or1k)
endif
$(eval $(call check-gcc-var,$(PIEFLAG_NAME)))
PIEFLAG := $(CFLAG_$(PIEFLAG_NAME))
ifeq ($(PIEFLAG),)
PIEFLAG := $(PICFLAG)
endif
# We need to keep track of both the CC PIE flag (above) as
# well as the LD PIE flag (below) because we can't rely on
# gcc passing -pie if we used -fPIE. We need to directly use -pie
# instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
$(eval $(call cache-output-var,LDPIEFLAG,$(CC) -Wl$(comma)--help 2>/dev/null | grep -q -- -pie && echo "-pie"))
# Check for --as-needed support in linker
ifndef LD_FLAG_ASNEEDED
_LD_FLAG_ASNEEDED:=$(shell $(CC) -Wl,--help 2>/dev/null | grep -- --as-needed)
ifneq ($(_LD_FLAG_ASNEEDED),)
export LD_FLAG_ASNEEDED:=--as-needed
endif
endif
ifndef LD_FLAG_NO_ASNEEDED
ifdef LD_FLAG_ASNEEDED
export LD_FLAG_NO_ASNEEDED:=--no-as-needed
endif
endif
ifndef CC_FLAG_ASNEEDED
ifdef LD_FLAG_ASNEEDED
export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
endif
endif
ifndef CC_FLAG_NO_ASNEEDED
ifdef LD_FLAG_NO_ASNEEDED
export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
endif
endif
link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
# Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
ifndef ASNEEDED
export ASNEEDED:=$(shell $(CC) -Wl,--help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
# Only used in installed libc.so linker script
ifeq ($(UCLIBC_HAS_BACKTRACE),y)
ifeq ($(HARDWIRED_ABSPATH),y)
UBACKTRACE_FULL_NAME := $(subst //,/,$(RUNTIME_PREFIX)$(MULTILIB_DIR)/$(UBACKTRACE_DSO))
else
UBACKTRACE_FULL_NAME := $(UBACKTRACE_DSO)
endif
export UBACKTRACE_ASNEEDED:=$(shell $(CC) -Wl,--help 2>/dev/null | grep -q -- --as-needed && \
echo "GROUP ( AS_NEEDED ( $(UBACKTRACE_FULL_NAME) ) )" || \
echo "GROUP ( $(UBACKTRACE_FULL_NAME) )")
else
export UBACKTRACE_ASNEEDED:=""
endif
endif
# Add a bunch of extra pedantic annoyingly strict checks
WARNING_FLAGS = -Wstrict-prototypes -Wstrict-aliasing
ifeq ($(EXTRA_WARNINGS),y)
WARNING_FLAGS += \
-Wformat=2 \
-Wmissing-noreturn \
-Wmissing-format-attribute \
-Wmissing-prototypes \
-Wmissing-declarations \
-Wnested-externs \
-Wnonnull \
-Wold-style-declaration \
-Wold-style-definition \
-Wshadow \
-Wundef
# Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
WARNING_FLAGS-gcc-4 += -Wdeclaration-after-statement
endif
WARNING_FLAGS += $(WARNING_FLAGS-gcc-$(GCC_MAJOR_VER))
$(foreach w,$(WARNING_FLAGS),$(eval $(call check-gcc-var,$(w))))
XWARNINGS = $(call qstrip,$(WARNINGS)) $(foreach w,$(WARNING_FLAGS),$(CFLAG_$(w)))
CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
# Save the tested flag in a single variable and force it to be
# evaluated just once. Then use that computed value.
$(eval $(call check-gcc-var,-fno-stack-protector))
SSP_DISABLE_FLAGS ?= $(CFLAG_-fno-stack-protector)
ifeq ($(UCLIBC_BUILD_SSP),y)
$(eval $(call check-gcc-var,-fno-stack-protector-all))
$(eval $(call check-gcc-var,-fstack-protector))
$(eval $(call check-gcc-var,-fstack-protector-all))
SSP_CFLAGS := $(CFLAG_-fno-stack-protector-all)
SSP_CFLAGS += $(CFLAG_-fstack-protector)
SSP_ALL_CFLAGS ?= $(CFLAG_-fstack-protector-all)
else
SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
endif
# Collect all CFLAGS components
CFLAGS := $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
-nostdinc -I$(top_builddir)include \
-I$(top_srcdir)include -include libc-symbols.h \
-I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH) \
-I$(top_srcdir)libc/sysdeps/linux \
-I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
-I$(top_srcdir)ldso/include -I.
ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
endif
# We need this to be checked within libc-symbols.h
ifneq ($(HAVE_SHARED),y)
CFLAGS += -DSTATIC
endif
$(eval $(call check-ld-var,--warn-once))
$(eval $(call check-ld-var,--sort-common))
$(eval $(call check-ld-var,--discard-all))
LDFLAGS_NOSTRIP:=$(LDFLAG-fuse-ld) $(CPU_LDFLAGS-y) -shared \
-Wl,--warn-common $(CFLAG_-Wl--warn-once) -Wl,-z,combreloc
# binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
#$(eval $(call check-ld-var,--gc-sections))
#LDFLAGS_NOSTRIP += $(LDFLAG_--gc-sections)
$(eval $(call check-gcc-var,-fdata-sections))
$(eval $(call check-gcc-var,-ffunction-sections))
ifeq ($(UCLIBC_BUILD_RELRO),y)
LDFLAGS_NOSTRIP+=-Wl,-z,relro
endif
ifeq ($(UCLIBC_BUILD_NOW),y)
LDFLAGS_NOSTRIP+=-Wl,-z,now
endif
ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
# Be sure that binutils support it
$(eval $(call check-ld-var,--hash-style=gnu))
ifeq ($(LDFLAG_--hash-style=gnu),)
ifneq ($(filter-out $(clean_targets) CLEAN_% install_headers headers-y,$(MAKECMDGOALS)),)
$(error Your binutils do not support --hash-style option, while you want to use it)
endif
else
LDFLAGS_NOSTRIP += $(CFLAG_-Wl--hash-style=gnu)
endif
endif
LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
ifeq ($(DODEBUG),y)
CFLAGS += -O0 -g3 -DDEBUG
else
CFLAGS += $(OPTIMIZATION)
endif
ifeq ($(DOSTRIP),y)
LDFLAGS += -Wl,-s
else
STRIPTOOL := true -Stripping_disabled
endif
ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
endif
ifeq ($(DOMULTI),y)
# we try to compile all sources at once into an object (IMA), but
# gcc-3.3.x does not support it
# gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
# gcc-4.0.x supports it, supports the --combine flag, but does not need it
# gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
ifeq ($(GCC_MAJOR_VER),3)
DOMULTI:=n
else
$(eval $(call check-gcc-var,--combine))
CFLAGS += $(CFLAG_--combine)
endif
else
DOMULTI:=n
endif
ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
endif
ifeq ($(UCLIBC_HAS_THREADS),y)
ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
PTNAME := nptl
CFLAGS += -DHAVE_FORCED_UNWIND
else
ifeq ($(LINUXTHREADS_OLD),y)
PTNAME := linuxthreads.old
else
PTNAME := linuxthreads
endif
endif
PTDIR := libpthread/$(PTNAME)
# set up system dependencies include dirs (NOTE: order matters!)
ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
PTINC:= -I$(top_builddir)$(PTDIR) \
-I$(top_srcdir)$(PTDIR) \
$(if $(TARGET_SUBARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
-I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
-I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
-I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \
-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
-I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
-I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
-I$(top_srcdir)$(PTDIR)/sysdeps/generic
#
# Test for TLS if NPTL support was selected.
#
GCC_HAS_TLS=$(shell \
echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
ifneq ($(GCC_HAS_TLS),)
gcc_tls_test_fail:
@echo "####";
@echo "#### Your compiler does not support TLS and you are trying to build uClibc";
@echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
@echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
@echo "#### about this problem.";
@echo "####";
@echo "#### Exiting...";
@echo "####";
@exit 1;
endif
else
PTINC := \
-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
-I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
-I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
-I$(top_srcdir)$(PTDIR) \
-I$(top_srcdir)libpthread
endif
CFLAGS+=$(PTINC)
else
PTNAME :=
PTINC :=
endif
CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
#CFLAGS += -iwithprefix include-fixed -iwithprefix include
$(eval $(call cache-output-var,CC_IPREFIX,$(CC) -print-file-name=include))
CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
CFLAGS += $(CC_INC)
CFLAGS += -I$(KERNEL_HEADERS)
ifneq ($(DOASSERTS),y)
CFLAGS+=-DNDEBUG
endif
ifeq ($(SYMBOL_PREFIX),_)
CFLAGS+=-D__UCLIBC_UNDERSCORES__
endif
# Keep the check_as from being needlessly executed
ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
$(eval $(call check-as-var,--noexecstack))
endif
ASFLAGS = $(ASFLAG_--noexecstack)
LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
$(eval $(call cache-output-var,LIBGCC,$(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name))
$(eval $(call cache-output-var,LIBGCC_EH,$(CC) $(LIBGCC_CFLAGS) -print-file-name=libgcc_eh.a))
# with -O0 we (e.g. lockf) might end up with references to
# _Unwind_Resume, so pull in gcc_eh in this case..
LIBGCC_DIR:=$(dir $(LIBGCC))
LIBGCC += $(if $(DODEBUG),$(LIBGCC_EH))
# moved from libpthread/linuxthreads
ifeq ($(UCLIBC_CTOR_DTOR),y)
SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
endif
LOCAL_INSTALL_PATH := $(if $(O),$(O)/)install_dir
PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"